US4777986A - Device for varying the density of warp threads in a weaving loom - Google Patents

Device for varying the density of warp threads in a weaving loom Download PDF

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Publication number
US4777986A
US4777986A US07/092,983 US9298387A US4777986A US 4777986 A US4777986 A US 4777986A US 9298387 A US9298387 A US 9298387A US 4777986 A US4777986 A US 4777986A
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United States
Prior art keywords
boards
support
guide
threads
pull
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Expired - Fee Related
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US07/092,983
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English (en)
Inventor
Jacques Brochier
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TISSAGE PAR LEVEE INDIVIDUELLE DE FILS 51-53 MONTEE de la GRANDE-COTE 69001 LYON FRANCE
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J BROCHIER SOIERIES
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Publication date
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Assigned to J. BROCHIER reassignment J. BROCHIER ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JACQUES, BROCHIER
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Assigned to TISSAGE PAR LEVEE INDIVIDUELLE DE FILS, 51-53, MONTEE DE LA GRANDE-COTE, 69001 LYON, FRANCE reassignment TISSAGE PAR LEVEE INDIVIDUELLE DE FILS, 51-53, MONTEE DE LA GRANDE-COTE, 69001 LYON, FRANCE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: J. BROCHIER, SOIERIES
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/38—Comber boards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types
    • D03C3/40—Constructions of lifting-cords

Definitions

  • the present invention relates to weaving, and more particularly to a device to vary the density of warp threads in a weaving loom.
  • the warp threads which are parallel to each other and define a warp, are connected to means which permit their selective displacement perpendicularly to the plane of the fabric being woven so that the woof threads may be introduced between the warp threads that are raised and those that are not, thus defining the filling or woof.
  • control threads each of which is provided at its bottom with a loop through which a warp thread is passed, its opposite top end being fixed to a hook at the bottom of a driving element which controls the movement of the control thread.
  • control threads each of which is provided at its bottom with a loop through which a warp thread is passed, its opposite top end being fixed to a hook at the bottom of a driving element which controls the movement of the control thread.
  • the machines have a fixed capacity and a number of control hooks limited to 1,344. This number is insufficient for weaving fine threads so that several control threads intended to be raised at the same moment have to be connected to the same control hook.
  • the set of control threads, or harness can be in the form of a straight harness 2 as shown in FIG. 1 in the case of the straight-fall mechanism shown in the FIG. 1 drawing, or a helix 3 as shown in FIG. 2 in the case of a lateral fall to the left or right.
  • the connecting control threads 4 between the control hooks 5 and the loops about the warp threads pass through a guide board 6, i.e. a board that has holes 7 for the passage of each control thread 4, thus assuring that the control threads are kept in order and are aligned with the corresponding warp thread.
  • the guide board determines the density of the weave.
  • Each warp thread is moreover subject to the action of spring or elastic pull-backs which are fixed on a hook beam and situated, with respect to the layer of warp threads, on the opposite side of where the control threads are situated. These pull-backs assure that each warp thread returns to its initial position when the force exerted on it by the control thread ceases to act.
  • FIG. 3 represents a fixed control block 8 of driving elements and two possible arrangements of the control threads 4 resulting from two ways of employingthe guide board 6.
  • the warp threads in the first configuration (shown the the dash-dot line) are in the same plane.
  • the warp threads are disposed along a curved surface, preventing the filling threads from being introduced.
  • the present invention is intended to remedy these disadvantages by providing an apparatus that will permit the density of the weave to be changed simply and rapidly for each type of cloth to be woven without dismantling the harness.
  • this apparatus combines an individual system for control of each warp thread through an adjustable position on a support and a series of small guide boards arranged essentially parallel to the warp threads, each guide board providing a number of holes for the passage therethrough of a corresponding number of control threads for the warp threads, these guide boards being mounted on their support so as to make it possible to adjust their number and their spacing.
  • control hooks are grouped on a certain number of modules, each module being locked adjustably in the desired position on a solid support on the frame of the loom, and that each guide board provides a certain number of holes for passage therethrough of the control threads, this number being a submultiple of the number of hooks on one module.
  • the number of hooks on one module is desirably 576, while the number of holes arranged on one guide board is desirably 96.
  • each guide board is suitably 9.6 mm wide. This provides, insofar as a dozen boards are arranged together for the guidance of 1,152 control threads joined to two modules, permitting a weave density of 100 threads per centimeter to be obtained. In such a configuration, the modules should be grouped in pairs and arranged head-to-foot.
  • the means for pulling back the warp threads consist of boards situated underneath the layer of warp threads and occupying the same arrangement as the guide boards.
  • these boards are made adjustable on their support, and the support itself is made movable vertically with the use of a jack between a first position corresponding to the work position in which the control threads are tight, and a second or relaxed position.
  • This relaxed position is a position which is adopted prior to the aforementioned adjustments to effect change in the density of the weave.
  • the guide boards and the pull-back boards may be adjusted in different ways, as for instance by engaging the ends of the boards in the slots provided at spaces determined on two scales, by mounting between the guide boards struts of a length corresponding to the distance desired between two guide boards, or by mounting the boards on their support through the use of a means of measurement and means of locking (by a screw or eccentric, for example).
  • FIGS. 1 and 2 are schematic view of prior art arrangements
  • FIG. 3 is a schematic illustration of an unsatisfactory option
  • FIG. 4 is a top view of a guide board for use in the present invention.
  • FIG. 5 is a view of the device for use in the present invention for pulling back a warp thread
  • FIGS. 6 and 7 are two views in perspective of two devices in accordance with the invention to position and hold the guide or pull-back boards;
  • FIGS. 8 and 9 are two side views of two devices made in accordance with this invention.
  • each control thread 4 is joined to an independent control hook.
  • These hooks (not shown in FIGS. 8 and 9) are grouped on modules 9, each module 9 having 576 hooks distributed in 24 plates of 24 hooks each. These modules will be described below, along with how they are mounted on their respective supports.
  • Each control thread 4 passes through a hole 10 set into a guide board 12 as shown in FIG. 4.
  • Each guide board 12 is 9.6 mm wide and has 93 holes 10 arranged in four parallel lines 11 as schematically shown in FIG. 4, each line being about 120 mm long.
  • a certain number of boards, depending on the width of the cloth and the density of the warp threads, are arranged parallel to each other in the direction of the warp threads.
  • the boards 12 are located on a guide frame 13 with two block stops 14 on its ends.
  • the boards 12 are next to each other, which corresponds to a maximum thread density.
  • the guide boards 12 are kept separate from each other by insert boards 15 which enables a lower density of warp threads to be obtained.
  • the guide frame 13a has a graduated scale 16 and is equipped with a locking mechanism 17 provided with a longitudinal opening 18.
  • Each guide board 12a is provided with a threaded rod 19 which enables it to be locked onto the plate 17 with a nut 20 after the position of each board 12a has been adjusted according to index marks 22 placed along the scale 16.
  • the pull-back boards 23 which are situated under the warp and each of which should occupy a position corresponding to that of a guide board.
  • the pull-back boards 23 have holes 24 for the passage therethrough of pull back threads 25, acting as elastic pieces, one end of each being fixed to the loop 26 through which the wrap thread passes and the movement of which is effected by a specific control thread 4.
  • the various pull-back threads 25 are mounted on the same support 27 and that this support may be moved vertically with the use of a jack 28 between a work position in which the warp threads are pulled back and an adjustment position in which the pull back threads are relaxed.
  • FIG. 8 represents an apparatus intended to make cloth with a warp of low or medium density, i.e. less than 46.8 threads per centimeter.
  • a certain number of modules 9, depending on the width of the cloth being made, are arranged in line, i.e. parallel to each other on the same support.
  • the separation between these modules 9 can be adjusted after loosening attachments 29 of each module and sliding a solid arm 30 of the module on a solid shaft 32 of a fixed support 33.
  • the arms 30 of the various modules 9 5 can be locked onto the shaft 32 with an eccentric 34, and the position of each module can be determinedwwith precision because of a graduated scale 35 on the support 33.
  • the modules are grouped in pairs, the two modules of the same pair being arranged head-to-foot, as shown in FIG. 9. In this case, two control shafts 32 should be provided, one for each module series.
  • the pull-backs 25 should first be put in a relaxed position with the jack 28, each module should be loosened from the control shaft in order to bring it into the desired position, the guide 12 and pull-back 23 boards should be positioned, the reed should be changed because the reed is the element that determines the width of the cloth, and finally it should be assured that the pull-backs 25 for the warp threads are tightened. It should be noted that this operation is carried out simply and rapidly with no modification of the harness, which is a factor in its economy and speed.
  • this invention greatly improves the existing technology by providing an apparatus that is simple in concept.
  • This invention has been described above for manual operation but can be very easily automated. It goes without saying that the invention is not limited only to the forms of apparatus described above as examples; on the contrary, it encompasses all the variants that might be built.
  • the number of hooks per module can be different, as well as the number of holes in the guide and pull-back boards, without departing in any way from the framework of the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
US07/092,983 1986-09-05 1987-09-04 Device for varying the density of warp threads in a weaving loom Expired - Fee Related US4777986A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8612884A FR2603612B1 (fr) 1986-09-05 1986-09-05 Dispositif de variation de la densite des fils de chaine dans un metier a tisser
FR8612884 1986-09-05

Publications (1)

Publication Number Publication Date
US4777986A true US4777986A (en) 1988-10-18

Family

ID=9338951

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/092,983 Expired - Fee Related US4777986A (en) 1986-09-05 1987-09-04 Device for varying the density of warp threads in a weaving loom

Country Status (6)

Country Link
US (1) US4777986A (de)
EP (1) EP0263764B1 (de)
JP (1) JPS63120130A (de)
DE (1) DE3771636D1 (de)
ES (1) ES2023933B3 (de)
FR (1) FR2603612B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302154B1 (en) 1999-10-28 2001-10-16 Staubli Lyon Spring connection device and assembly in a jacquard harness
US20040159361A1 (en) * 2003-01-16 2004-08-19 Bram Vanderjeugt Harness device for a weaving machine
US20040214822A1 (en) * 2001-07-17 2004-10-28 Gruenenthal Gmbh Substituted 4-aminocyclohexanol compounds
CN106801284A (zh) * 2017-03-22 2017-06-06 淄博银仕来纺织有限公司 一种用于大提花织造的分区目板及装造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19731447A1 (de) * 1997-07-22 1999-01-28 Textilma Ag Webharnisch und Jaquardwebmaschine mit Webharnisch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE201132C (de) *
DE140500C (de) *
US1150396A (en) * 1915-08-17 Eugen Seckler Comber-board.
DE836474C (de) * 1939-12-06 1952-04-15 Franz Bittner Vorrichtung zum Einstellen der Gallierung an Jacquardmaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR994962A (fr) * 1949-06-29 1951-11-26 Corps de façonné universel permettant le tissage d'étoffes de densités de chaîne et de largeur variables avec réappareillage immédiat
GB1079692A (en) * 1965-07-06 1967-08-16 Samuel Dracup & Sons Ltd Improvements in or relating to harnesses for jacquard machines
FR1564798A (de) * 1968-03-01 1969-03-17
FR2135883A6 (en) * 1971-04-29 1972-12-22 Gryspeerdt Andre Jacquard mechanism - using upper and lower frames carrying punched plates

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE201132C (de) *
DE140500C (de) *
US1150396A (en) * 1915-08-17 Eugen Seckler Comber-board.
DE836474C (de) * 1939-12-06 1952-04-15 Franz Bittner Vorrichtung zum Einstellen der Gallierung an Jacquardmaschinen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302154B1 (en) 1999-10-28 2001-10-16 Staubli Lyon Spring connection device and assembly in a jacquard harness
US20040214822A1 (en) * 2001-07-17 2004-10-28 Gruenenthal Gmbh Substituted 4-aminocyclohexanol compounds
US7678834B2 (en) 2001-07-17 2010-03-16 Gruenenthal Gmbh Substituted 4-aminocyclohexanol compounds
US20040159361A1 (en) * 2003-01-16 2004-08-19 Bram Vanderjeugt Harness device for a weaving machine
BE1015313A3 (nl) * 2003-01-16 2005-01-11 Michel Van De Wiele N V Nv Harnasinrichting voor een weefmachine.
EP1439249A3 (de) * 2003-01-16 2005-08-10 NV Michel van de Wiele Harnischvorrichtung für eine Webmaschine
US7168454B2 (en) * 2003-01-16 2007-01-30 N.V. Michel Van De Wiele Harness device for a weaving machine
CN106801284A (zh) * 2017-03-22 2017-06-06 淄博银仕来纺织有限公司 一种用于大提花织造的分区目板及装造方法

Also Published As

Publication number Publication date
EP0263764A1 (de) 1988-04-13
FR2603612A1 (fr) 1988-03-11
EP0263764B1 (de) 1991-07-24
JPH0361777B2 (de) 1991-09-20
FR2603612B1 (fr) 1988-12-09
DE3771636D1 (de) 1991-08-29
ES2023933B3 (es) 1992-02-16
JPS63120130A (ja) 1988-05-24

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Owner name: J. BROCHIER 51-53, MONTEE DE LA GRANDE COTE, LYON

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